int main()
{
	double n,a=0,b=0,c=0,d=0,x,ave1,ave2,ave3,ave4;
	scanf("%lf\n",&n);
	while(n>0){
		scanf("%lf",&x);
		if(x>=1&&x<=18)
			a+=1;
		if(x>=19&&x<=35)
			b+=1;
		if(x>=36&&x<=60)
			c+=1;
		if(x>60)
			d+=1;
		n=n-1;
	}
	ave1=a/(a+b+c+d)*100;
	ave2=b/(a+b+c+d)*100;
	ave3=c/(a+b+c+d)*100;
	ave4=d/(a+b+c+d)*100;
	printf("1-18: %.2lf%%\n",ave1);
	printf("19-35: %.2lf%%\n",ave2);
	printf("36-60: %.2lf%%\n",ave3);
	printf("60??: %.2lf%%\n",ave4);
	return 0;
}